<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    /**
   * @param {string} s
   * @return {string}
   */
      var reverseWords = function (s) {
        if (s == null || !s.length) return s;
        // let arr = s
        //   .split(" ")
        //   .reverse()
        //   .filter((item) => item.trim().length > 0);
        // return arr.join(" ");
        let arr = s.trim().split(' ');
        console.log(arr);
      };
      console.log(reverseWords('a good   example'));
  </script>
</body>
</html>